Question

Microbes play a dual role when used for sewage treatment as they not only help to retrieve usable water but also generate fuel Explain.

Answer 1

Explanation:

microbes play a dual role when used for sewage treatment as they not only help to retrieve usable water but also generate fuel . ... After the primary treatment ie sewage is mixed with air and aerobic bacteria grow into it. It produces floc which settles in the settling tank in the next stage and forms activated sludge.